The Southwest Station, Washington, D.C., is in the Capital District of the Atlantic Area. The Southwest Station has 48 city routes which are delivered by 59 full-time city carriers and 29 city carrier assistants. The Southwest Station also has 15 clerks, including 10 full-time and five postal support employees. We selected the Southwest Station for review based on the number of stop-the-clock (STC) scans occurring at the delivery unit. Our objective was to evaluate select mail delivery and customer service operations and determine whether internal controls are effective at the Southwest Station, Washington, D.C.